Steam actuated valve



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STEAM AGTUATED VALVE.

No, 377,423. Patented Feb. 7, 1888..'

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N. PETERS. Pmm-Limugmpher. wnshngkun. D. C.

d f UNITED J STATES APATENT OFFICE.

.HENRY W. BULKLEY, onnnsr ORAGE, Newv JRsEY.

` jSTEAM-ACi-LJZATE-D VALVE.

SPECIFICATION forming part of Letters Patent N oi 377,423, dated February '7, l1,888.

Application filed November 13I 1885.- `Serial No. 182.688. (No model.) 7

To @ZZ whom t may. concern.- y

Be it known that I, HENRY W. 'BULKLEY, a

citizen of the United States, residing atv East kIO Orange, in the county of Essex and lState of New Jersey, have invented a new and useful Improvement in lSteam-Actuated Valve'sfor Direct-Acting Engines, of which the following is a specification, reference beinghad tothe accompanying drawings, forming a part of the same, in whichj Figure l represents a vertical section through Athe steam-cylinder and valve-chest; Fig. 2, a

plan .view of the same with the cover removed; Fig. 3, also a plan View with the vmain slidevalve removed to show the main and auxiliarysteam and exhaust ports; Fig. 4, avertin cal transverse section of the steam-cylinder,

. seat-I, and upon which is iitted the auxiliary removable therefrom to facilitate the constru cf tion and repair of the same. y Y

' In the drawings, A is the main cylinder, and X Y Z steam and'exhaust `ports covered by the main cylinder-valve B, which operates upon a seat, I, Within vthe steam-chest J. A seat, I', isA formed in the chest adjacent -to the .cylinder D, which has steam and exhaust apertures formed in its bottom iiange, D', to it corresponding apertures in the seat l', and is provided with a tappet-rod, F, by which it is shifted at each stroke of the main piston. l

G is the mainr piston, Gy its rod, and H a tappet-lever oscillated thereby and operating, through a stud,`K2, upon tappets L Lf upon the rod F. The rod F is providedat its -inner end Witha collar or head, K, andthe cyl` inderD with hooked lugs K', fitted thereto and formed transverse to the seat I', so that the c cylinder may bedisengaged from the collar by lifting it from itsseatfwhen the cover Jof j the'chest J is removed, as shown in Fig. 2. n

An auxiliary piston, C, is fitted within the f' cylinder D,and has a rod, E, projeetedthrough '55 I Y.

the head D2, (at the inner endl of the cylinder D,) andis connected with the valve By by the rotary Anut B', fitted between lugs upon the back of the valve B inthe usual manner.

The fitting of the valve BA and cylinder `D to 6C A' their respective rods E and F permits them to f 'seat themselves steam-tight independently upon their seats I and I. e

rlhe main steam-piston G and slide-valve B are both shown'at the end of their rear stroke 6 5 ready to move forward, the steam-portX hav,' ing been opened by the combined action of f the lever H, auxiliary cylinder D, and'pisvton C. The steam admitted through the .portX would then operate to move the piston G and 70 v.

lever H forward until the stud K engagedthe tappet L upon the rod F,wlren the movement of the lcylinderD forward would press the cylinder-head D2 against the rear side of the v piston O and drag it forward with the main l75 valve until the pistonv C were independentlyY actuated by the admission of steam to the cylinder n D. Such admission is effectedy by a f steam-port, a, extending from a point between the piston Yand the head D?, through the flange 8vo w D', and .connecting'with a live-steam port, af, in the seat I. When such ports are connected, an exhaust-port, '12, extending from the opposite side of the piston, also connects with al;

port, b', in the seat l,so that the steam from 85 j 'Y the chest J may move the pistonv forward within the cylinder D and complete'y the stroke of thev valve B in the desiredmanner. f K

' Asis Well known in, such construction, 4the effect of the tappets l.upon the cylinderD 9c would be Wholly arrested (by the stoppage of the main piston G) when the movement of the valve B closes the port X, the remainder of the valve-strokebeing thereafter dependent upon the operation of the steam in the cylinder V9 5. D, as'with other steam-moved valves, When the movement of the valve-is thus completed, it would he in a position exactly the reverse to that shown in Fig. 1, with the port X Aclosed and the port Y open to the chest J, so lthat roo the steam wouldpress upon the front 'side of f the piston Gand force it back to the position shown in Fig. 1. Before it completely attained such position the stud K', shown in contact with the tappet L', would operate to move the cylinder D to theposition shown in Figjl'.Y In this position steam and exhaust ports d and e (communicating with the opposite sides of the piston C) would coincide with exhaust and steam ports d and e' in the seat I,to permit the steam to shift the piston C to the position shown in Fig. 1, and thus move the valve B to the position shown in the same figure. A repetition of these movements will occur ateach end of the stroke as the pistonapproaches the end of its' travel, the auxiliary cylinderbeing moved by the tappets suiciently to admit the steam through the port a or e, and the remaining movement of the valve required to reverse the motion'of the main piston being completed by the movement of the piston C within the auxiliary cylinder.

The exhaust-ports d and e are preferably arranged, as shown in Fig. 5, closer together than the steam-ports a and b, the piston C being thus compelled to pass over the exhaust- V ports before it has wholly moved the valve B,

and thus compressing the waste steam remaining in the cylinder D and cushioning the piston C at the ends of its stroke.

Should the auxiliary piston fail from any cause to move promptly, the stoppage or reversal of the main piston G would be safely and positively effected by the continued movement of the stud in contact with the tappets, operating to drag the piston C with the cylinder D, until the valve B had wholly cut o' the steam supplied to one side of the main piston, or admitted it to the opposite side to reverse its movement.

My device consists of very few parts, which are easily and cheaply constructed, and rcquire no exact fitting together to match their respective valveseats, as the sliding joint of the head K with the cylinder D and of the nut B with the valve B permits each to seat itself accurately, regardless of the exact distance of such seats from the centers of the rods E or F. rIhe form of such sliding joints also permits the cylinder D to be removed from the chest and the valve B to be detached from the rod F so that the cylinder -head D2 may be immediately removed if the piston lC or the interior of the cylinder requires examination. The construction of such sliding joints also permits the auxiliary cylinder and slide-valve to be replaced in the. chest after examination without danger of derangement, thus avoiding all necessity for the readj ustment of any ofthe parts.

`The size and particular construction of the auxiliary cylinder depends upon the size and style of the main' valve to be moved, and may be operated either by a lever or tappet, as shown, or by other equivalent means, as most desirable. The steam and exhaust ports of the auxiliary cylinder and its valve-seat may also be diiierently located, so as to vary the time for opening and closing the passage to the for mer, as may best be determined in practice.

The valveseats I and I are shown projected a little above the bottom of the steam-chest, but not upon the same plane, and the steam is admitted to the ports a and e by cutting them out through the edge of the seat into communication with the steam in the chest; but the ports may be supplied with steam by a drilled passage, as shown at BQ in Fig. 3, to connect the exhaustports in the seat I with the main exhaustpassage Z.

Beside the advantages mentioned, the construction also avoids the use of any valve moved separately from the cylinder D to distribute the steam to the opposite'sides of the piston C in the desired manner and the employment of a separate rod to actuate such auxiliary valve.

I am fully aware that it is not new in a direct-acting steamengine to move the main steam-valve partly by a tappet-connection and partly by the pressure of steam upon a piston connected with such valve; and I am also aware that an auxiliary cylinder' and piston have been used in other combinations, but operating in a manner diiierent from mine, to effect the final movement of a main steam-valve. Such combinations are shown in United States Patent No. 180,433, dated August 1, 1876, a'nd in British Patent No. 629 of 1876, in both of which cylinders and pistons are shown combined with a main cylindervalve to operate;

roo

it as a cut-oft' valve. In both of the said patents it is claimed that the cylinder and piston may, either of them, be attached to the slidevalve, and that the said valve is closed at some period prior to the end of the main pistons stroke by a simultaneous movementin opposite directions of the said valve-moving piston and cylinder, the motion of the slidelvalve being a resultant of the two movements of the.

associated piston and cylindr. In my construction the valve-moving piston and cylinder never actuate the valve by moving in opposite directions, but operate conjointly in the same direction to produce the required stroke of the valve. Neither is there in any of the constructions shown in the said two patents the same arrangement of the same parts which I employ, and which renders my construction wholly independent of any auxiliary valve.

I wholly disclaim the patents cited above and the mere use of a cylinder and piston for moving a slide-valve, as their use was known IIO Ils

long prior to the date of the patents cited; and

I also disclaim the connection of the slidevalve with a rod projected from a piston through the head of a moving cylinder, as such a construction is shown in the aforesaid patents, but operated by moving the cylinder and piston in opposite directions to give the valve a resultant movement, while my invention differs from such a construction in its functions,

lof operation.

inv the connection of. its parts, and in itsV mode constructions, broadly; but, v

Having set forth the natureand advantages of my own construction, what I claim herein is- A 1. In a direct-acting engine', the combination, with. the main slide-valve, of the auxiliary piston C, connected therewith by rod E,

lthe auxiliary cylinder D, connected at one end with the tappehrod F, and provided at the other end with the head D2, perforated .for the rod E, and suitable steam` and exhaust ports to admit the steam alternately to the opposite sides of the piston C, the cylinder operating, when moved by the tappetfrod, to press the vpiston and move the slide-valve a part of' the required stroke, and the piston C, when supplied withy steam, moving in the same direction rto complete the stroke of the slide-valve,

as and for the purpose set forth.

2. `In a direct-acting engine, the combination, with the steam-chest having valve-seats I and I', provided with steam and exhaust ports, of the main slide-valve fitted to the seat I therefore do not' claim such I, the auxiliary piston C, connected'therevvith by rod E,fthe auxiliary lcylinder D, connected at oneend by a transversely-sliding joint With the tappet-rod F, and provided at theother end with the headD", perforated for the rod Ethe cylinder being fttedito the. seat 1 and provided with steam and exhaust ports,`the

cylinder operatingywhen moved by theL tap-1 pet-rod,to' press the piston and-move theslidevalve a part of the required stroke, and vthe and relatively arranged substantially as described. `f l Y 7 y C HENRY, W. BULKLEY. Witnesses:

Crois. W. FORBES, F.` H. STRIEBY.

piston C, when suppliedwith steam, `moving 

